User:Amartyabag
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 Amartya Bag (bn : অমর্ত্য বাগ) is a legal professional and a proud Wikipedian. He is a Veteran Editor II, Autopatroller, Reviewer and Rollbacker on English Wikipedia. He came across Wikipedia while searching for some material on Julius Caesar for his school project in the summer of 2005 and he landed on Wikipedia and has been mesmerised by the wonderful contribution of some volunteers. Since then he continued to edit under IPs, mostly related to his place of residence. He is an active registered Wikipedian since 30 December 2005. The Double Asteroid Redirection Test (DART) was a NASA space mission aimed at testing a method of planetary defense against near-Earth objects. The target object, Dimorphos, is a 160-meter-long (525-foot) minor-planet moon of the asteroid Didymos. DART was launched on 24 November 2021 and successfully collided with Dimorphos on 26 September 2022 while about 11 million kilometers (6.8 million miles) from Earth. The collision shortened Dimorphos's orbit by 32 minutes and was mostly achieved by the momentum transfer associated with the recoil of the ejected debris, which was larger than the impact. This video is a timelapse of DART's final five and a half minutes before impacting Dimorphos, and was compiled from photographs captured by the Didymos Reconnaissance and Asteroid Camera for Optical navigation (DRACO), the spacecraft's 20-centimeter-aperture (7.9-inch) camera, and transmitted to Earth in real time. The replay is ten times faster than reality, except for the last six images, which are shown at the same rate at which the spacecraft returned them. Both Didymos and Dimorphos are visible at the start of the video, and the final frame shows a patch of Dimorphos's surface 16 meters (51 feet) across. DART's impact occurred during transmission of the final image, resulting in a partial frame.Video credit: NASA / Johns Hopkins APL
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